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Kalshi Faces First Criminal Charges in US Over Alleged Illegal Gambling

A landmark case tests who controls prediction markets—states or the feds. With billions wagered weekly, the outcome could redefine the industry's future.

The image shows a paper with the text "Newtown Market Hall, the Poll, Mr. William's Proposition in...
The image shows a paper with the text "Newtown Market Hall, the Poll, Mr. William's Proposition in favour against Majority" written on it.

Kalshi Faces First Criminal Charges in US Over Alleged Illegal Gambling

Prediction market platform Kalshi is facing its first-ever criminal charges in the US, as Arizona accuses the company of running an illegal gambling operation. The case marks a growing clash between state regulators and federal authorities over who controls these rapidly expanding markets. With traders now wagering billions weekly, the dispute could reshape how prediction markets are governed across the country.

Arizona Attorney General Kris Mayes has filed 20 misdemeanour counts against Kalshi, alleging it accepted illegal bets on sporting events and elections. Mayes argues that the platform operates as gambling, not as federally regulated futures contracts, and requires state approval. Kalshi has denied any wrongdoing, insisting that only the US Commodity Futures Trading Commission (CFTC) has the authority to oversee its markets.

The CFTC chairman has criticised Arizona's criminal prosecution, calling it a jurisdictional dispute rather than a valid legal case. This tension follows a 2023 Biden-era attempt by the CFTC to ban election-related prediction markets, which a federal appeals court later overturned, allowing Kalshi to continue offering them. Now, the agency is closely watching the Arizona case while weighing its next steps. Beyond Arizona, at least two more US states have either launched or explored legal action against prediction market providers in early 2026. State regulators argue that these platforms violate local gambling laws, challenging the CFTC's claim of exclusive federal jurisdiction. The surge in popularity—with weekly trading volumes hitting around $5 billion—has intensified scrutiny. One of Kalshi's markets alone, focused on Texas' Republican Senate nominee, has already seen over $10 million in wagers.

The Arizona case sets a precedent as the first criminal prosecution of a major prediction market operator in the US. If upheld, it could embolden other states to pursue similar actions, creating a patchwork of regulations. Meanwhile, the CFTC's response will determine whether federal oversight remains the dominant framework for these controversial but fast-growing markets.

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